BF: Improved labjack data handling

- If data is dropped by labjack USB HID interface, iohub labjack device
records proper amount of missing data and continues with reporting.
- If chosen sampling rate results in USB HID packets being returned by
labjack that have a first or last sample being a partial read of the N
channels being scanned, the partial channel sample is stored and the
remaining channel data for that sample is appended before the sample is
saved / streamed.
ENH: component name validation
ENH: added platform_specific.delaySleep() implementation for OSX
ENH: working on Cedrus button box Component (not finished)
BF: Fix status bar help strings in Builder

Two of the help strings displayed in Builder's status bar were not
correct because they referred to experiment files as python files.
ENH: Fix typos in source comments
Merge branch 'master' of git://github.com/psychopy/psychopy
BF: eyelink getLastGazePos binoc. support
Merge pull request #424 from philippwiesemann/fix-builder-statusbar

BF: Fix status bar help strings in Builder
BF: Fix display list leaks in stimuli objects

The OpenGL display lists created by four of the stimuli objects were not
deleted. In most experiments this may not matter because the stimuli are
usually reused instead of being deleted and created again. Still this is
an improvement because it allows PsychoPy to scale better in such cases.
Merge pull request #425 from philippwiesemann/fix-stimuli-displaylist

BF: Fix display list leaks in stimuli objects
ENH: added platform_specific.delaySleep() implementation for OSX
ENH: working on Cedrus button box Component (not finished)
ENH: still working on Cedrus button box Component (not finished)
ENH: Builder now uses wider Components panel by default
BF: Builder reload of previous experiments now working again :-)

Also, brings to front the relevant (ie changed) frame if checkSave dlg is needed
DOCS: changelog
Merge branch 'master' of github.com:peircej/psychopy

Conflicts:
	psychopy/app/builder/components/cedrusBox.py
ENH: Alpha Alpha TextBox stim

* TextBox stim can:
- redraw updated text contents 5 - 20x faster than current TextStim
class.
- other features not supported by textStim possible
- MONOSPACE FONTS ONLY.

* Also added some missing files / folders due to manifest.in
Merge branch 'master' of git://github.com/psychopy/psychopy